Mixing device for preparing mixtures such as mayonnaise and salad dressing



Aug. 2, 1938. w. A. MCLEAN 2,125,455

MIXING DEVICE FOR PREPARING MIXTURES SUCH AS MAYONNAISE AND SALAD DRESSING Filed March 51, 1936 5 Sheets-Sheet 1 Aug. 2, 1938. w. A. McLEAN 2,125,455 MIXING DEVICE FOR PREPARING MIXTURES SUCH AS MAYONNAISE AND SALAD DRESSING Filed March 51, 1936 3 Sheets-Sheet 2 M F/Qa F764 III I myw Aug. 2 1938. w. A. M LEAN 2,125,455 MIXING DEVICE FOR PREPARING MIXTURES SUCH AS MAYONNAISE AND SALAD DRESSING,

Filed March 51, 1956 3 Sheets-Sheet 3 MAL/19f? 4 N 1 N Patented Aug. 2, 193a UNITED STATES MIXING DEVICE FOR PREPARING MIX- TURES SUCH AS MAYONNAISE AND SALAD DRESSING William A. McLean, Geneva, N. Y., assignor to Geneva Processes, Inc., Geneva, N. Y., a corporation of New York Application March 31,

7 Claims.

My invention relates to mixing and emulsifying devices for materials such as emulsions containing high percentages of oil, such as mayonnaise, salad dressing, insecticide emulsions, etc. The mixtures may or may not be truly colloidal.

An object of my invention is to provide a device of the character described which will quickly and simply make a homogeneous mixture, or a colloid, if desired.

A further object of the invention is to provide a construction which is simple and durable and which is easily repaired and with parts easy to replace.

A still further object of my invention is to provide a mixing mill which has a large output with small consumption of power and which gives a desired homogeneity to the final product. 7

With these and other objects in view, which may be incident to my improvements, the invention consists in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements comprising my invention may be varied in construction, proportions and arrangement, without departing from the spirit and scope of the appended claims.

In order to make my invention more clearly understood, I have shown in the accompanying drawings means for carrying the same into practical elfect without limiting the improvements in their useful applications to the particular constructions, which, for the purpose of explanation, have been made the subject of illustration.

In the drawings,

Figure 1 is a view in longitudinal section of one form of my mill;

Figure 2 is a view taken along the line 2--2 of Figure 1, looking in the direction of the arrows;

Figure 3 is a sectional view showing a mixing 40 chamber and rotor construction of of mill;

Figure 4 is a sectional view showing the mixing chamber and rotor construction of yet another form of mill;

Each of the, Figures 5 to 12, inclusive, are illustrations showing in section mixing chambers and I rotor constructions of different types of mills, each of the drawingsshowing a different modification.

Referring to the drawings I have shown a support structure I provided with support spiders 2, the base of the support. structure I being designated by the numeral 3. The base 3 is adapted to lie on the casing 4 of an electric motor. The shaft of the motor projects upwardly, as indicated at 5, and is coupled by means of a coupling 6 to a another form 1936, Serial No. 71,932

shaft 1 of a rotor member 8. The shaft 1 is journaled in the supporting structure I at a point 9. Above the point 9, and forming the casing, is a cylindrical aperture Ill in which are housed journal members II and I2. The rotor 8 is a frustoconical element with a smooth surface. Mounted over a cylindrical aperture I 3 formed in the upper -part of the support structure I is a cylindrical support element I4 which is held by means of nuts I5 screwed through brackets IS in the support 10 structure I into a. position such that its interior surface is substantially in line with the periphery of the aperture I3.

The support member I4 is provided with screw threads I'I. At its top, screwed over the screw threads, is a screw threaded annulus I8 adapted to be manipulated by operating handles I9. Adapted to fit within the aperture formed in the support element I4 is a mixing chamber comprising a water or steam jacket 2| which may be suitably connected to a supply of cooling or heating fluid (connections not shown), a central chamber 22 and an exterior wall 23. Formed at the top of this member 20 is a flange 24 which is adapted to rest on top of the annulus I8. In the top of the member 20 is an aperture 25 which is interiorly threaded and which is adapted to receive screw threaded extension 26 of a filling funnel or hopper 21. Mounted on the interior of the member 20 are arms 28 which project inwardly and which are in staggered parallel relationship with arms 29 attached to a vertical rod 30 mounted in the center of the upper surface of the rotor 8.

The clearance between the rotor 8 and the bottom of the mixing chamber, 1. e., the bottom of the interior portion 22 of the mixing chamber, is controlled by raising and lowering the entire mixing chamber construction 20 by means of rotating the handles I9 to screw the annular member I8 up or down, as desired. When the proper adjustment has been made, wing nuts 3| on the bolts 32 may be tightened to hold the adjustment fixed.

Below the bottom of the rotor is a receiving chamber 33 which is provided with a slanted chute-like element 34 against which the mixture falls. The mixture, such as mayonnaise, flows down the chute element 34 and out at the aperture 35. The chute element 34 may be provided with apertures 36 through which may be flowed steam or cooling liquid, as desired.

In order to prevent splashing of the material, aperture is closed with a cover plate 3'1 which is .held in place by knurled nuts 38 which are screwed on bolts 39 inserted in the metal of the I support element I, such as by screwing them into apertures formed in the support element I.

In operation the required adjustment between the bottom of the mixing chamber 22 and the surface of the rotor 8 having been effected, the mixture is poured into the mixing chamber 22 until the surface of the rotor is completely covered, and in fact, under certain conditions, it is well to have the entire mixing chamber 22 filled with the rough mixture before mixing is started.

The motor is then started and the elements 29 whip around between the elements 28 and eflEect the mixture. The mixture is further homogenized in passing out through the aperture between the bottom of the mixing chamber 22 and the rotor 8. The mixing chamber 22 can be cooled or heated by the fluid in its jacket as desired. The finished mixture, which may be mayonnaise or some similar material, falls into the space 33 below the'rotor 8 where it may be either heated or cooled through fluid in the aperture 36 below the slide 34. The material flows out through the aperture 35 into a receptacle.

In Figure 3 I have shown another form of my device in which the frusto-conical rotor 8 is provided with a centrally mounted rod. 48 provided with paddle wheels M which may be of the propeller type. There are a plurality of additional supports 42 which are parallel to the rod 48. The rod 48 and the parallel supports 42 support arms 43 which are preferabiy at right angles to the supports 42. The arms 43 terminate in end members 44. The interior of the mixing chamber 22 is provided with arms 45 which also carry end members 46 similar in construction to end members 4i. This construction churns up the material and forms a good premix in the chamber 22.

In Figure 4 I have shown a construction comprising a chamber casting 5e which is adapted to slide up and down in the annular support I4. This construction is provided with a fluid chamber 5| which communicates through apertures 52 with an upper fluid chamber 53. The upper fluid chamber 53 is formed in a casting 54. The castings 58 and 54 form an oval mixing chamber 55 which has an upper opening 56 through which material is fed thereto. The lower part of the oval mixing chamber is provided with an aperture 51 which feeds into a chamber 58 with frusto-conical walls 59. I

The rotor 8 is provided with pins on its upper surface 68 of different height. There is a centrally mounted rod 6| which carries oval beaters 62. The material passes into the oval chamber where it is subjected to the action of the oval heaters 62 and then passes intochamber 59 where pins 68 act upon the material, and from there it passes between the rotor 8 and the frusto-conical surface 59 whence it is discharged.

In Figure 5 I have shown a mixing chamber casting I8 which is provided with a chamber II and a frusto-conical chamber 12. There is a fluid chamber I3 to either heat or cool the material treated. Therotor 8 is provided propeller-like members 14 and upstanding pins 15 .on the top of the rotor. On the frusto -conical surface of the rotor are other pins 18. These pins are in staggered reiationship with pins 11 on the frusto-coriical surface 12.

' In the form of rnill shown in Figure 6 I provide a mixing chamber construction 88 having a conical chamber 8| and afluid chamber 82. The

conical chamber j8l contains a conical rotor 83 having pins 84 on its upper surface lying stagcal shape.

gered relationship te the pins 85 formed on the conical interior surface 8| of the mixing chamber.

In Figure 7 is shown a ndxing chamber construction 98 which is provided with a fluid chamber 9| and mixing chamber proper 92 of cylindri- There is provided in this construction a rotor 93 of globular shape provided with the mixing chamber is designated by the numeral H8. The fluid chamber is designated III. This construction comprises an upper frusto-c'onical mixing chamber proper provided with an outwardly rounded mixing chamber section II3. Within the mixing chambers H8 and He is a triple rotor II4 comprising frusto-conical segments which are in staggered relationship to each other.

Figure 10 shows a form of mixing chamber I28 provided with a fluid chamber I 2I for either heating or cooling fluid. The mixing chamber proper I22 is bowl-shaped and within this bowl shaped mixing chamber I22 I have shown frustoconical rotors I23 in staggered relationship-F Figure 11 is somewhat similar to Figure 10 but the bowl-shaped mixing chamber I22 is provided at its base with a frusto-conical working surface I24 which lies adjacent the lower one of the rusto-conical rotors I23 and which parallels the surface of such rotor.

In Figure 12 I have shown a mixing chamber I38 having a fluid chamber I3I for heating or cooling the material being treated and a bowlshaped mixing chamber proper I32. this construction I have shown twc frusto-conical rotor members I 33 with two frusto-conieal sections having end surfaces lying in a continuation of each other. In this form of device there is provided a frusto-conical working surface I34 of the mixing chamber which is somewhat larger than the frusto-conical surface I24. The construction'is such that the lower frusto-com'cal rotor surface is substantially of the same dimensions as the working surface I 34.

While I have shown and described the preferred embodiment of my inveniion, I wish it to be understood that I do not confineii'iys'elf to the precise details of construction herein set forth,

bottom of the premixing chamber for the mixture to pass, a centrally located rod on the rotor, propelier vanes on the rod, arms in part supported by the rod and extending substantialiy at right angles to the rod, and a plurahty of additional supports for the arms mounted on the upper surface of the rotor.

2. In a mixing and emulsifying mill, a rotor,

.by way of illustration, as it is apparent that rod 3. In a mixing and emulsifying mill, a rotor, a premixing chamber above the rotor, there being left an aperture between the rotor and the bottom of the premixing chamber for the mixture to pass, a centrally located rod on the rotor, propeller vanes on the rod, arms in part supported by the rod and extending substantially at right angles to the rod, a plurality of additional supports for the arms mounted on the upper surface of the rotor, arms on the interior of the premixing chamber in staggered relationship to the first-mentioned arms.

4. Ina mixing and emulsifying mill, a rotor, a premixing chamber above the rotor, there being left an aperturebetween the rotor and the bottom of the premixing chamber for the mixture to pass, a centrally located rod on the rotor, propeller vanes on the rod, arms in part supported'by the rod and extending substantially at right angles to the rod, a plurality of additionaL supports for the arms mounted on the upper surface of the rotor, arms on the interior of the premixing chamber in staggered relationship to the first-mentioned arms, and end members on all the rods mounted substantially parallel to the supports.

5. In a mixing and emulsifying mill, a rotor, a premixing chamber above the rotor, there being left an aperture between the rotor and the bottom of the premixing chamber for the mix- 3 ture to pass, a centrally located rod on the rotor, propeller vanes on the rod, and arms in part supported by the rod.

6. In a mixing and emulsifying mill, a rotor, a premixing chamber above the rotor, a centrally located rod on the rotor, propeller vanes on the rod, arms in part supported by the rod and extending substantially at right angles to the rod, and a plurality of additional supports for the arms mounted on the upper surface of the rotor.

7. In a mixing and emulsifying mill, a rotor, a premixing chamber above the rotor, a centrally located rod on the rotor, propeller vanes for the rod, arms on the rod, and arms on the interior of the premixing chamber in staggered relationship to the arms on the rod.

WILLIAM A. McLEAN. 

